Hafgufa in the King’s Mirror

Record summary

The Hafgufa is a remarkable sea creature described in the Old Norse instructional work Konungs skuggsjá, or King’s Mirror, generally dated to the thirteenth century. The text presents it within a discussion of marvels and navigation, describing behavior that has prompted modern comparisons with whales, feeding aggregations, or legendary sea monsters. It matters because it is a specific medieval textual witness rather than an anonymous modern sighting. Interpretation remains uncertain: scholars debate observation, literary inheritance, translation, and naturalistic explanation. The passage should be studied in manuscript and genre context.